CVE-2021-47070— uio_hv_generic: Fix another memory leak in error handling paths
Quick assessment
Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在内存泄漏问题。
Possible ATT&CK Techniques 1 AI
T1496 · Resource HijackingAffected Version Matrix 8
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | cdfa835c6e5e87d145f9f632b58843de97509f2b< 261bbd90cc53d2835343f056770156cf1e82cf03 |
affected |
cdfa835c6e5e87d145f9f632b58843de97509f2b< 5f59240cf25b2f7a0fdffc2701482a70310fec07 |
affected | ||
cdfa835c6e5e87d145f9f632b58843de97509f2b< 0b0226be3a52dadd965644bc52a807961c2c26df |
affected | ||
4.20 |
affected | ||
< 4.20 |
unaffected | ||
5.10.241≤ 5.10.* |
unaffected | ||
5.12.7≤ 5.12.* |
unaffected | ||
5.13≤ * |
unaffected |
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I. Basic Information for CVE-2021-47070
Vulnerability Information
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Vulnerability Title
uio_hv_generic: Fix another memory leak in error handling paths
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved:
uio_hv_generic: Fix another memory leak in error handling paths
Memory allocated by 'vmbus_alloc_ring()' at the beginning of the probe
function is never freed in the error handling path.
Add the missing 'vmbus_free_ring()' call.
Note that it is already freed in the .remove function.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在内存泄漏问题。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2021-47070
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Other References for CVE-2021-47070 (2)
Same Patch Batch · Linux · 2024-03-01 · 13 CVEs total
| CVE-2021-47081 | 7.8 HIGH | habanalabs/gaudi: Fix a potential use after free in gaudi_memset_device_memory |
| CVE-2021-47078 | 7.8 HIGH | RDMA/rxe: Clear all QP fields if creation failed |
| CVE-2021-47069 | 7.8 HIGH | ipc/mqueue, msg, sem: avoid relying on a stack reference past its expiry |
| CVE-2021-47080 | RDMA/core: Prevent divide-by-zero error triggered by the user | |
| CVE-2021-47079 | platform/x86: ideapad-laptop: fix a NULL pointer dereference | |
| CVE-2021-47077 | scsi: qedf: Add pointer checks in qedf_update_link_speed() | |
| CVE-2021-47075 | nvmet: fix memory leak in nvmet_alloc_ctrl() | |
| CVE-2021-47076 | RDMA/rxe: Return CQE error if invalid lkey was supplied | |
| CVE-2021-47074 | nvme-loop: fix memory leak in nvme_loop_create_ctrl() | |
| CVE-2021-47072 | btrfs: fix removed dentries still existing after log is synced | |
| CVE-2021-47073 | platform/x86: dell-smbios-wmi: Fix oops on rmmod dell_smbios | |
| CVE-2021-47071 | uio_hv_generic: Fix a memory leak in error handling paths |
IV. Related Vulnerabilities
Same product: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
Same vendor: Linux
-
CVE-2026-98384
bpf: Fix out-of-bounds read of sk_protocol in bpf_sock_destr -
CVE-2026-98383
bpf: Disallow bpf_skb_pull_data() for LWT_SEG6LOCAL -
CVE-2026-98382
bpf: Reject dev-bound-only programs on other devices -
CVE-2026-98381
veth: manage XDP program pointers during channel resize -
CVE-2026-98380
net/sched: reject IDR error pointers when deleting actions
V. Comments for CVE-2021-47070
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